[time-nuts] Simple AC mains zero-cross detector

nuts nuts at lazygranch.com
Wed Dec 17 22:20:36 EST 2014

Zero crossing and frequency measurement are not the same thing.
Generally you zero cross detect to switch a load with the minimum
glitch. For frequency measurement, I'd filter the signal before
counting it. But of course a filter will shift the waveform, making it
not useful for a zero crossing detector. 

More information about the time-nuts mailing list